The popularity of foam mattresses means more couples are opting for sleep over sex. (Thinkstock)Is your love life getting you down? Are you spending too much time in bed sleeping and not enough time on … um … other activities? It could be your mattress. Canadians looking for a little extra night-time romance might consider what lies beneath the sheets.

As more and more consumers turn to memory foam mattresses for their sleeping comfort, they are making a choice between a good night's sleep and great sex, says a recent Barron's report.

"Memory foam mattresses are made from a dense, shock-absorbing material first developed for NASA in 1996 - great for spacecrafts, but perhaps not so great for the bedroom," says the New York Daily News.

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The problem, according to Sari Eckler Cooper, the New York sex therapist interviewed in the Barron's story, is a lack of traction.

"There's a lack of resistance for the knees and feet. And whoever is on the bottom is sinking into the bed," she says.

Daniel Burrows